make sure we run the finalizers in case of an uncaught exception

git-svn-id: http://svn.macosforge.org/repository/ruby/MacRuby/branches/experimental@1973 23306eb0-4c56-4727-a40e-e92c0eb68959

main.cpp

@@ -36,6 +36,6 @@ main(int argc, char **argv, char **envp)
     }
     catch (...) {
 	rb_vm_print_current_exception();
-	exit(1);
+	rb_exit(1);
     }
 }